Arkansas River at Portland
Future / Actual / Minor
OWP 2.0 WWA Modal Title
01/11/2021, 10:04 PM UTC through 01/11/2021, 10:04 PM UTC
Sender
Sent
- Warning: no valid ratings curve available. Transformations to and from FEET/CFS/KCFS will not happen.
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CATEGORY STAGE Major Flooding 11 ft Moderate Flooding 10 ft Minor Flooding 9 ft Action 7 ft Reliability of the Forecast:
NOTE: Forecasts are issued as needed during times of high water, but are not routinely available.
River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 24 hours into the future from the forecast issuance time.
Stage may be affected by ice during winter months.
National Water Model Hydrograph
Official NWS streamflow forecasts are produced by NWS hydrologic forecasters for river gauge locations using hydrologic models which are calibrated to that location. This process considers additional guidance and information, including local expertise and experience, to produce the best forecast possible. The NWM output provides supplemental guidance to NWS forecasters and should not be considered an official NWS river forecast.
Flood Impacts
- 15 - Flood waters flow into parking lot of Holcim Cement Plant.
- 12.5 - Flood waters reach base of railroad bridge near Holcim Cement Plant.
- 11 - Major Flood Stage.
Gauge Location
Recent Crests
| 1. | 7.48 ft | on 06-10-2024 | (P) |
| 2. | 7.52 ft | on 07-01-2019 | |
| 3. | 7.04 ft | on 07-23-2018 | |
| 4. | 6.43 ft | on 06-23-2017 | |
| 5. | 8.09 ft | on 06-18-2015 |
Recent Crests
| 1. | 7.48 ft | on 06-10-2024 | (P) |
| 2. | 7.52 ft | on 07-01-2019 | |
| 3. | 7.04 ft | on 07-23-2018 | |
| 4. | 6.43 ft | on 06-23-2017 | |
| 5. | 8.09 ft | on 06-18-2015 | |
| 6. | 9.46 ft | on 09-12-2013 | |
| 7. | 7.13 ft | on 06-06-2010 | |
| 8. | 12.94 ft | on 07-06-2006 | |
| 9. | 8.03 ft | on 06-24-1999 | |
| 10. | 7.70 ft | on 06-07-1997 | |
| 11. | 8.51 ft | on 06-18-1995 | |
| 12. | 8.03 ft | on 08-17-1992 | |
| 13. | 8.81 ft | on 08-12-1991 | |
| 14. | 8.93 ft | on 07-23-1985 | |
| 15. | 11.26 ft | on 08-02-1976 | |
| 16. | 10.09 ft | on 08-02-1975 |
Historic Crests
| 1. | 12.94 ft | on 07-06-2006 |
| 2. | 11.26 ft | on 08-02-1976 |
| 3. | 10.09 ft | on 08-02-1975 |
| 4. | 9.46 ft | on 09-12-2013 |
| 5. | 8.93 ft | on 07-23-1985 |
Historic Crests
| 1. | 12.94 ft | on 07-06-2006 | |
| 2. | 11.26 ft | on 08-02-1976 | |
| 3. | 10.09 ft | on 08-02-1975 | |
| 4. | 9.46 ft | on 09-12-2013 | |
| 5. | 8.93 ft | on 07-23-1985 | |
| 6. | 8.81 ft | on 08-12-1991 | |
| 7. | 8.51 ft | on 06-18-1995 | |
| 8. | 8.09 ft | on 06-18-2015 | |
| 9. | 8.03 ft | on 08-17-1992 | |
| 10. | 8.03 ft | on 06-24-1999 | |
| 11. | 7.70 ft | on 06-07-1997 | |
| 12. | 7.52 ft | on 07-01-2019 | |
| 13. | 7.48 ft | on 06-10-2024 | (P) |
| 14. | 7.13 ft | on 06-06-2010 | |
| 15. | 7.04 ft | on 07-23-2018 | |
| 16. | 6.43 ft | on 06-23-2017 |
Vertical Datum Table
| type | NGVD29 |
|---|---|
| major Flooding | 5032.59 ft |
| moderate Flooding | 5031.59 ft |
| minor Flooding | 5030.59 ft |
| action | 5028.59 ft |
| Latest Value | 5023.54 ft |
| Gauge Zero | 5021.59 ft |
Collaborative Agencies
The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.